You cannot merge a question with something that is not even in the Stack Exchange site.
As for making a question Community Wiki, moderators can make any post Community Wiki, and make a Community Wiki post a normal one. The purpose of a CW question is not penalizing who answers a perfectly legitimate question, though; its purpose is avoiding somebody gets reputation for answering a question where all the answers are equally valid. At least that was the purpose of CW questions when CW questions were the way to legitimate subjective questions. Now questions need to be acceptable as they are, without being CW. (There is a blog article about the change of the CW question's purpose.)
It is true that, when a question is made CW, users who answered don't lose the reputation gained before the question is made CW, but it is also true they lose any reputation gained from future up-votes.
In this case, the OP gained 5 points, while each of the users who answered the question gained 40 points. The gain from the OP who is trying to workaround the suspension is very limited, compared to the users who answered what seems a perfectly acceptable question.
Rather than penalizing the users who answered, who cannot know if the account has been created from a suspended user, I would rather penalize the user who keeps asking questions when he is not allowed.
Let the questions not be CW; just prolong the suspension time for the suspended user, which means suspend him again when the current suspension ends.